Machine for making oorruaated pipe from sheet metal



(No Model.) Y 5 Sheets-Sheet l. 0. P. BRIGGS. MACHINE POB. MAKINGGORRUGATED PIPE PROM SHEET METAL. No. 430,266.

2. .Tu e Dv .n s s .TJ e e h s 5 Sw G G I .R DD P 0 M. d 0 M O m MACHINEPOR MAKING GORRUGATED PIPE PROM SHEET METAL. No. 430

Patented June 1,7, 1890..

5 Sheets-Sheet 3.

(No Model.)

O. P. BRIGGS. MACHINE POB. MAKING GORRUGATED PIPE PROM SHEET METAL. No.430,266.

Patented June 17, 1890;

im I

QIIMMILH .L l,

a nu A I l I l 5 Shets-Sheet 4.

(No Model.)

0. P. BRIGGS.

MACHINE POB. MAKING GORRUGATED PIPE PROM SHEET METAL.

Patented June 17, 1890.

(No Model.) i 5 sheets-sheer 5.

0. P. BRIGGS. MACHINE POR MAKING GORRUGATED PIPEv FROM SHEET METAL.

No. 430,266'. Patented June 17, 18.90.v

UNITED. STefrfrisf ORLANDQ- P. BRIGGS, oF. cHicAGQ-ILLINois, AS'SrGNoR,Bit. DIRECT-ANU MESNE ASSIGNMENTS, "ro or SAME PLACE.

JAMES gi. 'Mlmnn?. AND1 solenni? I B. MILLER-,Q

srncmcairloiv forming part of Letters Patent N01 430,266, medium rz',1890. A

Applicatim filed November 9, 1885. Renewed December 11, 1889. Serial No.333,302. (No model.)

To all whom it may concern.:

Be it known that I, ORLANDO P. BRIGGS, ofv Chicago, in the county ofCook and State of Illinois, have invented certain new and usefullmprovements'in Machines for Making.

Corrugated Pipe from Sheet Metal, and I do hereby declare that thefollowing is a full,

clear, and exact descriptionthereof, refer? chine for seaming andconjugating sheetmetal pipe or tubing; and it consists. in the mattershereinafter described, and pointed out in the appended claims. Themachine herein illustrated as embodying my invention comprises as itsessential feature a longitudinally-movable mandrel, devices for bendingand clamping the sheet metal about-'the mandrel, and seamin g devicesconsisting, essentially, of"stationary seamfolders acting upon themarginal parts of the sheets to fold the latter together during thelongitudinal movement of the mandrel.

The means herein shown for corrugating the tubing consistsin -a mandrelprovided with a series of longitudinal grooves or corrugations andclamping-jaws provided with',

corresponding grooves or corrugations,wliere by when the sheet-metalblank is clamped upon the mandrel it is bent into corrugated form, aswill hereinafter fully appear.

In the accompanying drawings, illustrating my invention, Figure l is acentral vertical ,longitudinal section of a machine embodying myinvention. Fig. 2 is a transverse section thereof, taken upon line wg;of Fig. 1. Fig. 3 is a similar section taken upon liney y of Fig.' 1.Fig. 4 is a similar section taken upon line c ,e of Fig. 1. Fig. 5 is adetail transverse section taken upon line at( Figfl. Fig. 6 is a detailtransverse section taken upon line y y of Fig. 1. Fig. 7 is a detail endView of the machine. Fig. 8 is a detail crosssectional view taken uponline z z of Fig. l. Fig. 9 is an enlarged detail of a part of Fig. 8.Fig. 10 is a plan view of a cam-plate H6. Fig.

l section taken upon line a; a; of Fig. 11'. '13 is a detaillongitudinal section takenupou vof the parts shown. in Fig. 13, takenupon -seam'ing devices." Figs; 2'1"'andv 22- are detail views ofseaming-rollers shown in Fig. 20,

ofl the seam-folder shown in Fig. 24, taken 1-1 is a detail horizontalvsection taken upon* 5 lin'e :v2 'x2 of 1 and'2.. Fig. 12 is a detailFig.

line y2 y2. of Fig. 2. Fig. 14 is a detail section line a: a: of said.figure. Fig. 15 is a sectional plan view ofv the-rear portion of themachine', taken upon line z2 z2 of Fig. 1. Figs. 16 and 1 7 are detailsections taken upon line mwand I y y, respective1yof Fig. 15. Fig. 18isadetail cross-section taken upon line y y of Fig. 13. Fig. 19 is adetail plan section of a' part shownin Fig. 13, taken upon line z z ofsaid ligure. Fig. 20 is a detail plan View of the taken upon lines .z3wily-3 ys, Fig. 1, respectively. Figs. 23 and 21k-are elevations, and'Fig. 25 a perspective view, of the seam-fold--f` ers, viewed frombeneath. Figs. 26, 27, and 28 are detail sectional views of theseamfolder shown in Fig. 23, taken upon lines war, v y y, and z .e 'ofsaid figure, respectively. Figs. 2 9, 30, and v31 are-detail sectionalviews upon lines w y y, and z 2' of said gure, re Spectively. Figs. 32and 33 are sectional views illustrating the process of forming-the seam.Figi` 34 is a plan view of the belt- 8o shifting devices. 35 is an endView of the same. Figs. 36 and 37 are detail views of parts shown inFigs. 34 and 35. 38. is a detail sectional view upon line y y, Fig. 11.

Fig. 39 is adetail view illustrating a circular form of mandrel.- A Inthe machine illustratedinthe drawings, A indicates the main frame orbed', which consists, principally, of two heavy plates orgirdersarranged parallel with eachother and connected by suitable crossties or girts, and B indicates a travelingv bed or carriage sustainedupon the' frame A and constructed to slide in'longitudinal grooves orways A upon said frame.;

C is the mandrel, which is sustained upon the carriage B and is' movablelongitudinally thereof. A

D 'is a vertically-movable clamp-bar lccited beneath theY mandrel andmovable longitudinally with the latter.

E E E2 are a series of clamp-bars movable inradial planes obliquelytoward and from the mandrel and mounted in supports or arms B', rigidlyattached to the carriage B, and F E F2 are a series of gibs held -inframes or castings A2 upon the .machine-frame, and constructed toencounter the ends of the clamp- `bars in the forward movement of thecarriage, so as to force the said clamp-bars rearwardly and inwardly,the inner edges of said gibs being located in position to 'engage theouter-surfaces of the clamp-bars after the latter have been thrustinwardly,` and to thereby hold said clamp-bars fromoutward movementwhile the seam is being formed. Said gibs are held betweenguide-surfaces a, formed in strong castings A2, attached to the. bed Aat' both sides of the path of the carriage.

G G are laterally-movable benders or folders located upon the carriageat either side of 4the mandrel for bending upwardly about the mandrel aflat sheet of metal or blank from which the tube is to be formed, sothat the said `blank may be carried with the mandrelbetween theclamping-bars E E. E2 preparatory to the actionV of the latter thereon,and H H are clamp-bars mounted in the carriage B upon either side ofVthe clamp-bar D Vand between'said clamp-bar and the clamp-bars E E E2,for the pnrpose'of forcingV into contact with'the mandrel the part ofthe; metal between the clamp-barD and said side clampbenders operatingto fold together the edges of the metal to form the seam, and Lisacompressing-roller for pressing down the folded seamto form a tightjoint.

The rollers I I I2 I2, the seam folders J and K, and thecompressing-rollerL are sustained upon the tops of the castings A2 over`the ,path of themandrel and operate to form the seam during thelongitudinal movement-of the said mandrel in amannerhereinafter fullyset forth.

The carriage 13AV vis somewhat. longer thantwice the length of themandrel YC, and the latter is movablelongitudinally upon the carriagethrough a path of somewhat greater length than the *saidmandrel. Thelclampbar supports orarmsB B' are located at the forward portion .of thecarriage,(referring to its .direction of motion whiletheftnbe is beingformed,) and the said clamp-bars E E E2 2 and thesupports BB are ofapproximately thesame length as the mandrel, these parts be-` ing soarrangedthat the mandrel may be moved back n pon the carriage until freefrom said su p- YYports to enable the .flat blanks to beclamped thereonby the action of the clamp-bar D. The

-43am c Y 1 castings A2, by' means of which the gibs FF' F2 aresupported, are located at theend of the .machine-frame toward which thecarriage moves in forming the tube, and in such position that when thecarriage is at the rearward limit of its movement the clamp-barsupports" B will be free from saidcastings, the said clamp-bar supportsbeing adapted in the for- Ward movement of the carriage to freely pass.

between the said castings A2, and thereby enable the clamp-bars to.engage the gibs held in said castings. f The rollers I I" I2 I3 aresupported in suitable arms or brackets 1 4 I5 l? I7, mounted upon lthecastings A2 in position to operate successively upon the edges of theblankin the. forward movement of the mandrel beneath them, the saidrollers for this purpose being located at the portion of the castings A2adjacent to their rear end. The seam'ing-dies J and K are held insuitable brackets J4 K2, attached to the top of the said castings A2 inadvance of the forward roller I2, and the compressingroller L is mountedin'a frame L', sustained at the forward end of the castings A2, soastooperate upon the seam as the mandrel emerges the carriage B to beadvanced so as to carry the mandrel entirely past the said casting, so

that theclamp-bars may be released from the gibs and allowed to expandto free the tube,

and a suitable spring detent or stripper Mis attached to the frame Lover the mandrel in vposition to engage the rear edge of the fin-- ishedtube and to thereby hold the tube from backward movement with themandrel, so as thefree end of the mandrel sustained in this manner trombeing lifted or thrust upwardly out of its place when the clamp-bar D isforced upwardly against it, a seriesof rollers 'n are located upon themachineframe in position to rest upon the top of the mandrel'f Thegirder :may be made, in practice, in anyl manner suitable to give thenecessary strength therein, said girder, as herein shown,

being composed of`v two parallel'plates ln/,vsecured togetherl by boltsn2, passing through blocks N4, which are located between the A platesln. and 'aiford bearings for verticallyadjustable bars'N, inthe lowerends of which the rollers n are mounted.' Said bars are ",heldl withthe'rollers in 'proper position'for operation by means of set-screws n3,passing through lateral projections upon the bars ,and

'abutting against the girders and bolts n, y passingthrough lugs uponthe barsand entering the blocks N4, whereby the vertical position of therollers may be adjusted. -As a preferred means Aof supporting themandrel upon the carriage B, a longitudinally-movable sliding supportOis mounted in suitable guides' in the said carriage below the mandrel,said support being provided atV its rearen'd with a` rigid standard O',having sliding-connection Aatits uper vend with the mandrel. VTheclamp-bar D is supported upon the sliding mandrel-support O, saidclamp-bar.4v and support'being provided upon their adjacent'faces withaseries of intriit- .ting inclined faces d o, so arranged that when thesupport is moved longitudinally with -referenceto the clamp-bar thelatterwill be lifted into contact with the mandrel. The clamp-bariscon'nected with lthe mandrel by means permivttingma.yertical-butA notalongi-A tu'dinal movement ofA said clamp-'bar with reference to themandrel, themeans for this Y purpose herein shown as'consisting of shortlinks d', pivotally connected-with 'the rear" Vend ofthe clamp-bar, andvwith a'vertical bar or standard D passing vertically through the mandreland resting at its lower'end upon -the upper surface of the support O,said bar D,-.together with the standard O- ,ser'ving'to rigidly; sustainthe mandrel ina horizontal position.t The slidingconnecton betweenthe'standard'O and the mandrel is formed by means Vofa-T-head o upon thestandard O engaging a correspondingly-shaped longitudinal recess' C" inthe mandreL'as clearly shown in Fig. 8. The mandrelis movedlongitudinally upon the carriage by suitable actu-l ating devicesapplied to the sliding support, 4O, and the purpose of the slidingconnection between the mandrel and the support O is to enable the latterto be moved asuiicient distance to actuate the clamp bar D 'before themandrel partakes of the forward movement of the said support, adetent'Cz, engaging the mandrel, being employed to hold the latter frommovement with the support O-until the clamp-bar has been forced up-lwardly into contact with the mandrel.

.bar before the said standard 0' engages the ing supporti), 4the .saidsupport. is provided machine, said shaft vbeing provided with fastforward end of the recess.l C,'and thereby v'causes a forward movementof the mandrel.

To enable the relative movement of the rackbar Aand mandrel to beadjusted as desired,a set screw -or bolt al2 vis desirably inserted jthrough the standard O in position to bea n at its inner end uponpthebar D'. v

In the particular construction of the parts herein illustrated themandrel is provided in its upper surface with a notch c forengagementwith the detent C2, and the latter con- .sists of a sliding bar arrangedto move vertically in a suitable Abearing -'formed' between the plates nof the girder N, the downward movement of the detent being limited by atransverse rod c', secured in the plates n and passing through avertical slot c2 in the de-4 tent. The detent C2'is lifted out ofengagement with the notch c by means of a curved detent, the upperportion of the arm o2 being arranged below the level of the top ofthemandrel and adapted to enter a groove or re- -cess in the upper surfaceof-the latter, whereby Y drel.

As a preferred means for actuating the slidupon its lower 4surface .withspur-teeth O2, v

which are 1 engaged by a pinion o3. upon a transverse shaft o, mountedin suitable bear ings in the carriage B, and provided with a 'beveledgearA o5, engaging a beveled pinion o6,

mounted upon a shaft-'03arranged longitudinall;7 of the machine-frame,and having bearings o7 in the said carriage and other bearings o8 uponthe bed Aat therear end of the `upon the bed,.the shaft O3 is extendednearly the entire length of the bed and is made longitudinally movablein its'A bearings o7-in' the carriage, the beveled pinion o6 beingprovided with a spline engaging 'a1 longitudinal groovein the shaft,whereby said wheel may slide longitudinally upon the shaft during themove'ments of the carriage. Said shaft, as herein illustrated, isunsupported from .the frame andY made conical at its forward end, sothat when withdrawn from one. or more of its bearings o7 in the.rearward movement of the carriage it will readilyv re-enter saidbearings in the succeeding forward movement .of the said carriage.

In order to release the clamp-bar D from the finished tube, astop o9 isprovided at the forward end of the frame, adapted to encounter thesupport 0 shortly before the clampvIIO `fbais'E lil-E2 become disengagedfrom the gibs and to thereby hold said support from f urther forwardmovement with -the mandrel, which latter is held by the clamp-bars fromback.

ward movement upon the carriage, vthe stop `o9 being preferably solocated that the clamp-A bars E E E2 will become disengaged from thevgibs at the moment that the support O reaches the vrearward limit ofits movement relatively to the mandrel and after the clamp-bar D isfully retracted.

The folding-devices shown for bending the side'portions of the blankupwardly around the mandrel after it has been clamped upon the latter bythe action of the clamp-bar D are constructed as follows: The folders GGare each formed of two parts, consisting of longitudinally-arrangedplates G movable upon the sides of the carriage B in a directionradially toward and from the mandrel, and flaps G2, hinged to the upperedges of the platesG' in such manner that the said flaps may be swungupwardly, so as to bring their inner surfaces against the sides of themandrel. e

The devices herein shown for actuating the parts G and G2 0f the foldersare constructed' as follows: The said plates G are mounted to 4slide inan oblique direction upwardly and manner as that the said plates will bethrown upwardly and rearwardly, and thereby advanced toward the mandrelwhen the said inclined faces g2 encounter the rollers .in the forwardmovement of the carriage. The roll# ers are located in position toengage the outer or lower edges of the plates G', so as to hold thelatter from outward movement after they have been thrust inwardly by thesaid rollthe rollers G3 are mounted in and the cams G4r ers, Fig. 17.

The flaps G2 are swung upwardly or thrown toward the mandrel by theaction of stationary upwardly and inwardly inclined cams G4,

Figs, 15, 16, and 17, which are arranged to encounter and lift the iiapsin the forwardmovement of the carriage in an obvious manner. In theparticular construction herein illustrated j are formed upon heavy metalarms or brackd of the carriage B,^as clearly shown in Fig. 4.,

ets G5, bolted to the sides of the main frame A of the machine andoverhanging the sides YIn the operation of the machine the carriage ismovedforward for'actuating the folding devices after the lower clamp-barD has been lifted to clamp the blank of the mandrel and before the saidmandrel begins its advance movement upon the carriage for carrying theblank between the` .clamp-bars E E E2. In this advance movement of themandrel 'the blank, being held upon the mandrel by the clamp-bar D, isobviously moved with the mandrel, and is thereby 'carried out ofengagementwith the flaps G2and into the space between the arms B and in.y

position for the action of the clamp-bars E E E2 thereon. y I A Therollers G3 and cams G4 obviously remain in engagement with the' plates Gand iiaps G2 of the folders While the carriage is being moved forward tobring'the clamp-bars E E E2 between the gibs F F F2; butin the advanceof the carriage to carry the clampbars beyond the gibs'the said plates Gand flaps G2 will pass forward of the said rollers and cam surfaces andbecome disengaged therefrom. In order to prevent the said flaps V8s iand plates from falling outwardly away from the mandrel at this time,longitudinal guideplates G are secured to the machine-frame over thefiaps, said plates being provided with longitudinal grooves g3 in"theirlowerM l faces, constructed to engage projections g4 upon the'freeedges of the flaps, so as to hold 2 the said flaps from outwardmovement. Said groove and the projection g4, if found necessary, may beprovided with lateral exten'- sions g5 g, making them of -L shape, asclearly shown in Fig. 17, so as to' positivelyhold the plates G fromdownward movement.

To positively throw the platesG and flaps G2 outwardly or away from themandrel, so as to bring them into position for the insertion ofthe fiatiblank after said plates and iiaps have been carried past the rollers G2.

and cam-surfacesG4 in the backward move- IOO ment of'the carriage, rigidarms G7, provided with forwardly-directed inclined projections gi,Figs-7 and 15, are attached to the sides of the frame A in position toengage the rear ends of -the said plates and flaps shortly before thecarriage reaches the rearward limit of its movement, the projections g7being vadaptedto enter between the iaps and thev mandrel and to engagethe inner surfaces of the flaps, so as throw the latter outwardly, andthe arms being constructed to arrest the rearward movement of theplates, and thereby cause said plates' to be movedoutwardly by slidingupon the oblique guides b. The clamp-bars H are held 'and adapted toLslide between guide-faces ,b b in the carriage B and located in theforward part of said carriage beneath the clamp-barsrE. As a convenientmeansy for actuating the clamp-bars H, two longitudinally-arrangedshafts H are mounted in the carriage B below and radially in line withsaid clamp-bars, each of said shafts -being provided with a series ofeccentrics h, engaging the lower edges of the clampbars in such mannerthat when the shaft is given a .half-rotation in one direction theclamp-bars will be 'advanced to engage the mandrel, and when turned toan equal extent in a reverse direction the clamp-bars will be releasedand allowed to fall away from said mandrel. rear end of the carriagewith intel-meshing gear-wheels h h', and one of said shafts' is extendedrearwardly beyond the carriage and is provided upon its rear endwithtwo-ra# dial pins h2, engaging cam-grooves h3, formed in astationary casting H2, said .grooves h3 beving adapted to move thepins'h2, so asto give a partial rotation to the shaft H as the said pinsare carried through th'emtin the forward movementof the shaft andcarriage-and thereby cause the clamp-bars H Ato -be forced to. ward themandrel. 'lhei'grooves-h3 are made set forth, the pins h2 are carriedforward out straight and parallel with the shaft H in their rearportions, so as to'enable the pins h2 to travel through them withoutturning the shaft while the carriage isbeing .advancedlto causethe'operation of the folders Gr, and are madeof curved or spiral form intheir p'arts adjacent to'the front end of the casting, the

said spiral parts being locatedin position to` give a partial rotationto the shaft and thereby cause the advance toward the mandrel of theclamp-bars'H'H after theV ma-ndrellhas been moved forward upon thecarriage, and at the beginning of the forward'movement of the latter tocarry the clamp-bars-E E E2 into engagement with the gibs F F Fh In thecontinued forward movement of the carriage, after the shafts have beenrotated, as above of the cam-grooves h3, the grooves preferably beingarranged to give the shafts a half-rotation, so that .the clamp bars Hwill be held in contact with the mandrel by theeccenti'ics unless theshaft is forcibly rotated to release them. A l

In the. particular construction of the parts herein illustrated thetubular casting H2, in which the grooves h3 are formed, is held by boltsor otherwise within a tube H4, rigidly secured in a cylindric. opening,formed in" the upper part of a standard Hattached' to the rear end ofthe frame' A. In order to give a backward turn -to the ccentric-shaftsH', s o as to release the clamps H at. the for .ward-limit of 'themovement of the carriagey and permit the mandrel to be withdrawn fromthe finished tube, one -of the said shafts is extended beyond the front.end of the carriage B and is provideduponits vforward'end with aradialarm H'constructed to engage a stationary can`1-plate H6, Figs. 1and 10, 1o-

.cated at the forwardend of the machine and arranged togive partialbackward rotation to the 'shaft when encountered by thelsaid.

arm. The -armH5 and eamplate H6 are preferably arrangedv to give onlyabout a onequarter turn to the shaft, this -being .a 's u'icientmovement thereof to release, the clamps for the purpose stated.- Thepins h2 wil-l ob-. viously leave the cam-grooves h3 after the shaft hasbeen turned toclose' the clamps in the forwardmovement of .the carriage,and in order to bring the pins into positionto re.

enter the said grooves in the backward move- The shafts H are providedat the the arm H5 .andfcam'pla'te H6, as above -deabove stated. .l

the frame A consists of a heavy raek-bar2 secured to the lower surface'of the carriage of the frame. a .pinion p, intermeshiugwith-'a.spur-wheel p' .upon ashaft Phaving upon wheel P.- The shaftP is alsoprovided with whichl passes the belt-P7, for actuating themoving. thecarriage backwardly.. The gearing described is so proportioned power andat relativelys'low rate of speed.

mitted thereto, is, A'instead of beingl secured' sleeve p3,which'rotates freely upon the shaft,

wheel p5 upon the 'shaft P2,'the wheels'pand ofspeed.

The severalclamp-bars-E Ef E2, as' more' place between said guide-facesby means off blocks o r studs b3, rigidly secured in the said.

carriedinwardly into contact with the maningly-threaded aperturesin theinner parts being providedl with collars at either side of.

ment ofthe carriage after the shaft hasbee'n turned partiallybackward'byfthe action of .79 scribed, vthe side Walls of the groovesare cut awayat their forwardends, as vindicated at' h4, Figs. 13 and 19,in such manner as to form inclined faces adapted to engagethe pins andto partially turn the shafts for thepurposesaid shaft in driving thecarriage forward,- and with'a loose pnlleyvPf, to which the said 'beltlmay be shifted when thecarriage f1 's. stopped. Said shaft is alsoprovided with a jlwhichreverse motion is given thereto forV The meansherein shown,'-Figs.' 1. 34, for moving the carriage longitudinal-lyupon' between theA 'guides A" -ofthe frame,V said rack-bar beingengagedby a .'spurwheelP, mounted to .rotate freely upon a-trans'versef;shaft P', having upon one of .its ends'otside S.

it a pinionpe, inter-meshing with the said'spur'-V a pulley P3,rigidlysecured to the shaft, over y 'as to drive the'carriage forwardwith great y IOO To' provide fora quickreturn .or backward motion ofthefcarriage, the pulley-P5, thrpugh Ythe medium of which the power for.giving .a

backward movement to the"carriage 'is tra'risf directly to the .shaft P,mounted upon ai 'and u'pon the said sleeve isurigidly securedaspur-wheel 1p",- vintermeshing with ajspurp5 being made of aboutthe samesize, so that the motion of the pulleyP5 will be transmite. ted directlytothe shaft P2 .without any 1i')ss the parts e' to hold qthem frolnendmovement 1&5 clearlyshowninFigsandll,aremadetosld' between parallelguidesurfacesb2, formed `in the arms or castings B', and" are-held 1nsaid arms, and upon whichthe guide-surfaces therein, and. having upontheir outer ends heads adapted for engagement with a wrench, wherebysaid bolts may be rotated andl the distance between said parts therebyadjusted to give a greater orv less pressure upon theY blank, asdesired.

In order to relieve the bolts e3 of transverseV 'strainwheu theclamp-bars are moved bodily by the contact of the parts ethereof withthe gibs F F F2, the parts eA and e2 are pro-'- vided with interlockingrecesses and projections eg e4, having parallel side faces arrangedtransversely to the sides of the bars, so as to positively hold the said'parts e and e? from relative longitudinal movement. The said parts c'e2 also are cut awayT at their-adjacent edges between the bolts e3, asclearly shown in Fig. 11, and in the spaces thusformed are located posts'64, which serve to rigidly unite thev wedge-shaped parts B3V composingthe b2 are formed.

The clamp-bars, consisting of the connected parts e e2, are held at thefbrward limit of their movement, so as to stand normally free from themandrel, by means of spiral springs E, connected with the parts e' ofthe clampbars'and with the frame B. These springs may be arranged in anysuitable manner; but in the particular construction illustrated they arelocated within recesses formed in the castings B3, Fig. 38, and areconnected at .obviously be the same whatever the diameter I one end withlugs b5 upon the frame and at theiroppositeendswith studs esecured inthe said clamp-bars and'passing through slots 66 inthe parts'Bs. Thelower guide-,surfaces b2 of the' arms B are preferably provided withtransverselyfarran'ged proj ections 'or ribs b", Figs. 11 and 38, uponwhich the clamp-bars E E E2 rest and slide, the surface between saidribs being depressed, so as to leave spaces beneath the clampLb'ars forthe free exit of scale which may be detached from the ironin bending it.

The machine shown is adapted for making pipe of dierent sizes ordiameters by insert! ing mandrels of greater or less diameter and byproviding the clamp-bars at their inner edges with removable strips d*h5 e?, 5,

varying in width to correspond with the sizes of the mandrels employed.When-the ma, chine is adapted for making corrugated pipe and the mandrelis provided with corruga tions or grooves corresponding in number andlocatlon wlth the clamps, as `herein shown, the number of corrugationsor grooves will of the pipe made. Y

The parts e of the clam 'l are,as clearly shown in Figs. 2, 3, 5,and'hlcbnstructed to extendv outwardly beyond the arms B', so as toengage the gibs F F F2, the parts being relatively so arranged that whenthe forward ends -of the-said parts e ofV the clamp-bars encounter therear ends of th'egibs thei clamp-bars .will be thrust bodily backwardand will therebyfbe -movedinwardly and,V

caused to engage the mandrel. The said:

clamp-bars, so that the latter may-pass tween'the gibs, andv will beheldathreby positively from outward movement. .The said gibs F F F2 areconnected with: the

castings A2 by means of a series of short pivoted links j', and a-stopf.is provided at the forward end ofthe gibs to limit their forward y 8o fmovement, the stop being soarranged that when the gibs are in contactwith the-stop.

the links will be inclined forwardly, thereby sustaining the gibsunyieldingly from out-- ward movement, but enabling the gibs t'o'bemoved outwardly if thrust bodily backward by pressure applied at their.forward ends. The said gibs are held normally at the forward limit oftheir movement by springsfzl suitably applied for the purpose,.saidsprings, as herein shown, being placedl about sliding rods f s, providedwith laterallyextending heads at their inner ends adapted .tojbearagainst the sidesof the links f 'nearest the ends of the gibs, asclearly shown in Fig. 11. The object of the construction described inthe means for supporting the gibs is toen@ able the latter to yieldoutwardly. to allow the movement past them of the clampfbarsE E E2 inthe backward movement of the carriageA after said clamp-bars have beenadvanced beyond the gibs toallow'the release I Y of the linishedtube,itbeing entirely. obvious that when the rear ends of Ysaid vclam'pdmrsencounter the forward ends of the gibs in the rearward movement ofthecarriage said gibsY w'ill be thrust backwardly and outwardly for,

the purpose stated.

In order to enablethe gibs to be moved in? y wardly and outwardly foradjusting them, as

may beY found necessary or desirable, thc Y linksf, instead of beingpivoted directly to the castings A2,' are connected with ,bars'F held incastings by bolts f t, set-screwsff Y ing inserted th rough the castingand arranged to beafagainst the bars F3, wherebythe lat? ter may bemoved and held in their changed' positions.

when ,the clamp-bars 'E E Eare thrust; endwise by the contact with thegibs F F'JF.V

the .outward str'ai'n caused-by the pressurefof the said.. clampbarsupon vthe mandrel'will -obvious'ly'be transmittedto the aj'ruslflifthroughthestuds b3, Ithis strain obviously tending to 'force saidarmsapart attheirrupj;

` per endsrflu'order to relieve this strain the arms and to holdfallthepartsrigidlyto vvtheir work, massive armsQ are 'bolted to the bed VAattheir lower ends and areseured together and to the fgirdr 'Nfbymeausfpf boltsq, inserted throughthe Asaid, arms Vand ingsnrfaces qrestingagain'st'the frames 'V both' above andbelow the'cla'mp-bars E.

l joint, and the -fourth set of rollers I3, Fig; 22,

The rear ends of the gibs F-F F2, which are engaged bythe'clamp-bars'are preferably located one in advance of the other, asclearlyshown in Fig. 1, so that vsaid clampbars Will besuccessively'closed upon the man di'el in the forward movement of thecarriage.

When the machine is adaptedV for making: corrugated `pipe, the severalclamp-bars H, E, E,, and E2, beginning with the Abar mostre-l 'mote fromthe free edge of the sheet, will be actuated in succession,therebyenabling the metal of the blank'- to; be vforced into the groovesof theinandrel without stretch. inuit. y f.

' irhe rollers I i 12.1? are maderas-usable :radially-toward' and'from,the mandrel by vmeans of adjustable coi'inectio'nsuniting the brackets14.15 l6 lwit'h castings'or plates '18,1

which are bolted to the tops of the castings A2 for supporting saidbrackets. Said'adjustable'connections are formed, as herein'shown, bymeans of set-screws L fz. i? z3, passing through outwardlyprojectinglugs upori the said brackets and engaging the upper surfaces ofthe-plates I8, and bolts i4 a?. i6 i?, passing through f'slots in thesaid brackets and entering thread- Y ed'apertures in the casting'sIB,the set-screws beiiigei'nplo'yed to force the rollers toward themandreiand the bolts to hold the brack- -ets firmly inpl'ace. The rollers I,operating firstupon the metal, are provided lwith ap-.

proximately-cylindric' or slightly concave v worl'zing-faces adapted tobend inwardly-toward each other the free edges of the metal above theupper clampbars E2 E2, assclearly shown in-Fig. 2. The sec'ond'pair ofrollers I',

Fig; 6, are provided with projecting parts or beads 'enteringzhe groovesin the adjacent surface lof the mandrel and adapted to force the metalclosely into thev said grooves. The third pair of rollersI2 (shown indetail in Fig.'2 l) are provided at their adjacent faces with pa'rts is,

are parallel with each other in their parts ad-V jacent to the mandrel,so as to bring the mar? ginal portions of the sheet metal together and"in position for the operation of. the seam- Ris awedgesh'aped guiderigidly secured adapted to bringv the edges ofthe sheet metal morenearly together and to force the metalinto contact with the mandrel nearthe line of the are provided with beveled -surfaces which folders J andK thereon.

over the mandrel betweenthe rollers I 1 .12, with its pointed'forwardend between the 7 rollers l2 and I3, -said guide serving to bend l themarginal parts of the metal-sheet upwardly -oroutwardly as the sheetjisclosed byV therollers against the upper surface of the mandrell and -tothereby bring thesaid mar- .ginal parts of the sheet at right angleswith the top surface ,of the mandrel, so that when the edges of thesheet reach the fourth pair.

Voff-rollers I3 they may be readily brought together thereby in'avertical plane.

It will be understood, of course, that a de vice for bending the metalpreparatory to the operation of the seamfolders, comprsing awedge-shaped guide and a seriesofrollers, may comprise aV greater orless number of latter is placed beneath the mandrel, as clearly shown inFig. 4.

The seam-folder J (moreclearly shown in marginal part s of the sheet,extending above the shorter marginal part s', over the latter into thepositionindicated in Fig. 33. Said parts J J 2,-having adjacentverticalfaces j', forming a vertical slotjz, constructedvto guide and sustainthe marginal parts of both sheets, the part J having a surface jg, (moreclearly shown in the detail sectional view, Fig. 26,) adapted to engageand bend laterally the marginal part s of the sheet, so as to bringtion, as clearly shown in Fig. 27. The part 'J 2 J', and the forwardportion of the said part ating to bend the horizontallyturnededge sterminating ina groovej5, operating to close said part supon the part swhen it leaves Y the said folder J, as clearly shown in Fig. 28. 'Thefolder K is for the purpose of turning the parts folded by the folder Jdownwardly, so that they will rest flat upon the adjacent said folderconsists of two-parts K K2, having opposing vertical faces klo', formingbetween them a passage k2, Fig. 29, which is ,cui-ved. ordeflectedlaterally, as more clearly shown in Fig. 30, to bend the said foldedparts down- W'ardendof the part K', which latter4 is pro-v vided nearits forwardendwith a surface k3, vforming a continuation of the top wallof the cent parts of the blank, as clearly shown in Fig. 31. y

The lower surfaces of the part J2 of the. folder J and of both'of theparts of the folder tions of the blank adjacent to the seam, so v as tohold said portions firmly in Aplace while the marginal parts are beingbent by theaction of the said folders, as clearly shown in Figs. 26 to31, above referred to.

vloivnii'ardly after vit leaves the part- J 2, and

rollers than are present in the machine here- .of the nietal'blank-areso"- engage one edge ofthe fiat blank when the Figs. 23 and 25) is soshaped as to turn the folder for this purpose comprises opposing thesaid marginal part into a horizontal posi extends about one-half thelength of the part J is formed Withan inclined surface j, operportion ofthe metal, and for-this purpose- Wardly toward the mandrel, the part K2of the folder being terminated short of the for-- groove k2 and arrangedto bend or press the'.

folded parts of themetal closely to theadja- I K are preferably made torest upon the por- The part J of the folder J is preferably providedwith a separate part or plate J3, the

\ edge of which forms one o f the side walls j of theA groove 72, andwhich is adjustable hori zontally upon the upper portion of the saidpart J to enable the width ofthe groove j2 to be changed in working upondierent AIo ki vnds or thicknesses of metal. To enableI the folders tobe adjusted vertically in the use of mandrels of different sizes andunder Aother circumstances,.the parts J and J2 are made adjustablevertically upon the arms J 4 and J 5,

the devicesfor attaching them to the arms -justing them.

l73, passing through slots in the plaie, to a ver# ticalpiece or bar J3, made separate from the part J and placed between the arm J5 and thesaidv part J bythe bolt 9'6 holding the latter, this vconstructionobviouslyf allowing a vertical as well as a horizontal adj ustmentof theplate J3.

. The parts K K2 of the foldeK are adj ust.

Y .ably connected with the arms K3 K1 bymeans of bolts 194 105, insertedthrough vslots in the vertical Shanks of the said parts K K2 in the samemanner as before described in connec-y tion with the parts of the folderJ.

To give further bodily adjustment to the partsJ J2 and K K2 of thefolders J and K r vrelatively tothe mandrel, the arms J4 J 5- and K3 K4,snstainingsaid parts, are attached to the' castings A2 by means'ofjbolts passing through slots inthe arms, whereby the latter Amay bemoved laterally, as clearly shown in i the'plan view of the parts, Fig.20.

The compressing-roller Lgis provided about its periphery with a shallowgroove Z', and is so shaped as to press the seam and the metal at eitherside of it rmly and closely down upon the mandrel, and to therebyform atight joint. In -the particular constructionpf the parts hereinillustrated the said roller is mounted in a vertically-movable block L2,held in suitable guidesv in the frame L', the

roller being held down toits work by springs, YasZ2, located between thetop` surface of the block- L2 and a follower L3, which is'held 'inV'position by set-screws and bolts Z3 Z4, whereby;

the follower may be adjusted .vertically to vary the 'pressureof thespring in a'familian l man ner.

It will be observed that.theseveralfdevices :for formig theseam arearranged in posi-V 'tion to operate .upon the sheetmetal--whenvtheclamp-bars E E' E2 are cxligaged-byvv the f gibsF F F2, so 'that theseam isfforinedat a i time'wlien'the sheet metakis'heldat-all'points'closely and'rrmly in` contact with the man-x 5A forin f and making'alltubes of the same size,

dreh thereby making the tube-acei'lrate.in,`

O4 O5 upon the shaft O3. is supported .by a horizontally-sliding bar v,

notwithstanding variations in the quality or characteristics of themetal.

After the seaming has been completed by theoperation ofthe seaming'devicesv de- 7o i scribed thev inotion`of' the carriage is contin ued,as before stated, until the arms B thereon and the clamp-bars E E E2 arefree' from the gibs, when the tube is released andbecomes engaged -atits inner end with the spring-detent M, wherebyv in the backwardmovement of the carriage the tube is stripped from the mandrel. y

The driving-shafts P and O3, byrwhich the mandrel-support O and the;carriage are actuated, may be started, stopped, and reversed,

so as vto givethe desired relativee'movement to theseveral parts, by anysuitable mechanism, actuated veither by hand or by the movement of themachine. Y A preferred construction in devices for this purpose; wherebythe several movements will takeplace' automatically in the proper order,and in which said movements are accomplished by belt-shifting devices,is herein shown, and is as follows:

5U is a belt-shifter engaging the beltPl,

which passes over the lfast and loose pulleys P3 P4 of the maintransverse driving-shaft P',

and V is a belt-shifter engaging the belt O3,

which passes over the fast and loose pulleys wh ich is actuated by meansof a pivoted handlever V', said parts being mounted upon suitablesupports attached `to the posts N3, as clearly shown in the drawings,Figs. 34 and The belt-Shifter V IOC v2 is a longitudinally-arranged barorrd located over the mandrel, with its 'rear endconnected with thelever V at a point 'u' between its axis, and its end engagedwith the bar'u and sustained from the girder N at its forward' end by means ofbarsor plates v2,

having at their lowerends upwardly and for- Wardly inclined slots fc3,engaged by a pin V3 in the forward end' of the rod V2. The said rod V2is 'provided also upon its lower surface near its forward end with aprojection 04, having a vertical face adapted toengage a stop -or pinC3, located upon the mandrel near the rear end thereof, these partsbeing so constructed that when the .pin C3 engages and wiLLwhen mved asuicient distance to cau'se theshifting of the belt, -be lifted bytheIIO `the face v4 in the forward movement of the mandrel the rod V2 willbe carried forward,-

movementofjthe pin V3 iu the slots v3, so'as to causethedisengagementofthesaid pin romtheBaidSurfaCe Q14. Y j

The boi ,shifter uis attachedw a 'tar U',

mounted to slide' transverselyinthe frame of the machine, andlsaid-shifter 'is connected also with a 'rock-shaftUby'means of .a de' 1-pending arm u2 irppnthe said shaft'engaging au arma. -uponthefbeltlshifter. The rock-1f shaft U2 isarranged 'parallel with theina-- ching-frame and exte'ngafrem-- said-beit y shifter U to a pointnear the rear fend of the frame, said rock-shaft 'being connectedfby"means of a depending arm us lwith the horizo'ntal sliding bar U3,extending inwardly to a pointover the mandrel, and-provided upon itsendwith a horizontal swingingspringpawlu4, located in position to engage astop C4 upon the mandrel in such manner that in the .beginning of theforward movement .of saidv mandrel the pin C4 will engage the pawl u,and/thereby throw the bar U5 outwardly, said pawl u being adapted .toyield to permit the passage of the pin in the backward movement of themandrel without producing any movement in t-he said rod or therock-shaft. The stop C4 is arranged a short distance from the pawl 11,4,so that when the shaft O3 is started by the movementY of the hand-leverv V and the support O is moved forward, as

before described, the stopC4 will, as soon-as the mandrel begins tomove, engage .the said pawl u4, and thereby 'thrust'the bar U3 outwardlyand move the rock-shaft, so as to shift the belt from the loose pulleyP4 to thefast pulley P3, and thereby start the carriage,

This movement of the carriage continues u'nutil the sliding plates G andthe aps G2 of the folders engage Athe. rollers G3 andcamsurfaces G4, andsaid folder isthrown .in-

wardly and upwardly thereby.A rIn order to stop the carriage when thefolding is accomplished, 'to enable the mandrel to be carried carry themandrel C forward Auntil it is fully within orbetween the'arms B- B,when the 'step' C3, striking the projection v4 of the rod V2, will carrythe said rod endwis'e, thereby moving the belt-shifter V and shiftin gthe belt O8 from the fast to the loose pulley of the shaft O8, so as tostop the movement of the man'-v drel. To againA shift the belt froml thelooseA pulley P4 to the fast pulley P3, so asto start the carriageforward tov actuate the clamp-.

connected with a depending M111, 11,6 upon the V :sll'aftU2, and whichhas 'uponits inner end a spring-pawl u", arranged in an Vinclined position in the path of the 'pin vC4 in the same manneras is thepawl 11,4,before described; so that whenf'the saidl pin C4 strikesthe said pawl"u? the bar U4 will 'be thrust j'outwardly, and` i chef 4shaft U'Vthereby turned' to move the shifter inthe incliner'beforev described;Af-;

f terthe pin Cvhasmoved past the pawl u'the movement otl thecarriageiwll continuenntil the forward limit of its movement-is reached,

tion of inovementof .the said /carriage Vwill come into operatiomashereinafter described. The pins C3 and (Stare, asshown,'located i`n E toprevent interference of thesaid pins '\vi t`h frombetween the castingsA2 Yfor the ljl'aleas'e of the v'clamp-bars from the tube, saidpins arevn i'ade to slide inthe mandrel andares'us- Fig-s. 8 and 9, so that theymay be lforced .downwardly bythe saidrolljers when they sume theiroperative position when released tion of the pins illustrated, Fig. 9,the said pins are provided with axial prolongations c4, extendingthrough`the lower surface of the limit the'upward movement of the pins,the

about the said prolongations c4 between the lower ends of the pins andopposingslioulders in the mandrel. Y

-TQ move the .the belt P"' from the fast vpulley P3 to the loose pulleyP4 at. the forward termination of the movement'. of the carriage, thebar U, which,-

connected with-'a bar or link U5,y arranged generallylparallel f withthe-sidesgofthe frame bai' U5, will thrustthe said bar laterally, andthereby move the bar U in a direction to carry v the belt from the saidpulley P3 to the pulley4v P4. For reversingthe direction of rotation-ofV ward after it has reached the forward limit of its movement, abelt-shifter W isprovd'ed for shifting the beltP8 from vtheloo'se pulleyP6,

movement of the carriage, tothe pulley Pf", which actuates the gears pp,driving the verselylarranged bar W, sustai'ned in suitwith theforwardend of a'. rearwardly-extend;

V'lhesf'tid barVT'i's fgagementwith the pin or stop Bfylccatedl upon'ranged'to engage said bar and thelcbyaetu-'l ate the shifterW at thesame'. time that the aliilter U is 'movedby the contact of -tl1e'Y pinbelt P7, which operates to move the"A carriage forward-,vill obviouslybe shifted from the" 2 riage. backward,

when editable devices for reversing the direc? ley the pulley.ablebearings' in the frame A, and connected 126. ing barn), pivoterhntwi to the said carriage.A 1 "Y ocated in positionfor enthe lo'w'ersurface of the `carriageB and, ar-

the'rollers I I" I2 -Isiwhen the mandrel passes Y beneath said rollersin its movementforward tained in operative position by springs es; j j

come in contact with the latter, and will refrom said rollers. In theparticular construcanandrel, and provided with nuts orheads'to A springsn3 being of spiral form and placed benfshifr [nso as to shia as before;stated, isarranged to slide transverselyin bearings in the bed A, ispivotally- IOO "and pivoted at u8 to the latter, said bai' being. '1arranged for engagement with a pin B4 upon the lower surfaceofthecarriage in such man ner that the said pin, by encountering thesaidthe shaft P', so as to drive the carriage back-l 11o vupon 'whichY saidlieltruns in the forward -.nwith the bar' U5. -By this eonstrpenou the 16 theftop surface of the mandrel, and,in' order 1`I`5 carriagebackward.Thesaid beltshifterW"` 1' is mountedupon the end of a horizontall'trans-A IKS For the purpose of stopping the movement ofthe carriagewhen it reaches the rear end of the machine the sliding bar W is con--nected with the 'rear end of a bar W2, pivote'd at its Vforward end tothe bed A, an'd a pin B6 is arranged upon the forward end of the canmoment in the rearward movemenltfof the carriage..

In order to save time in the operation-o the machine, the rearwardmovement of themandrel upon the bed is preferably made simultaneous withthe rearward movement; of the bed itself, and in order-'that the mandrelshall reach the rearward limit of its movement at the same time that thecarriage reaches the rea-r end of the frame it is necessary to move themandrel upon thebed faster Athan the carriage is.. moved. /For thispurpose the belt O9, passing over 'the p ulleys O6 O7, by which themandrel is driven backward, is trainedover a driving-pulley O11 upon asuitable counter-shaft, said pulley O11 being considerably larger thanthe pulley 01, from which the-'pulleys O4l O5 are driven, thereby givingthe ,desiredv diierence in speed bein the drawings the mandrel iscorrugated longitudinally, and the `faces of the clamp- -bars are shapedto correspond with the surtween theforward and rearward vmovement ofthemandrel. l

A suitable belt-shifterXr. is provided for Y m'vg`tlre-belt`, Aand meansare provided for actuating .said shifter, which`,.a s herein shown, areconstructed asvfollows: At the side `of thecarriage Badjacent to' theshaft iisl located a longitudinal bar X,:to the end of which theshifterX is rigidly attached. The

said barXv is sustained at its rear end by means of an arm or bracketX2, provided with a'pin fr, passing through an inclined slot m' in thebar X', and said bar is sustained at its forward end by means of abracket X3, provided with a slot (r2, inclined in the same direction asthe slot az' and engaged byapin w3 in the bar X', the slots a? and pinsa: m3 being so arranged that when the bar is, moved bodily downward thesaid bar will, by the action of the pinsvin the slots, be given an endmovement sufficient to shift the belt from one to the other of thebelt-pulleys O6 O7. The said bar X is held at the forward and upwardlimit of its movement by means of a spiral spring X4, attached to thestud :v4 upon the bar and to the bracket X2. a lateralinwardly-extending rib or flange X5, terminating at its forward endin averticallyswinging hinged latch -or pawl X6, which is sustained normallyin an inclined position, as indicated in Fig.`,37, by resting upon theforwardly-projecting part or end X7 of the said bar X. Upon the side ofthecarriage B is located a pin B7, adapted to engage the outer` uppersurface of the inclined pawl X6 in the lrearward movement of-thecarriage, and to thereby thrust th bar X downwardly and forwardly tocause the shifting of the belt. The bar when thrust forward is held inthis The said bar X' is provided with "ps'iiiou'by the contacter theSaid pin B7 with the flange X5 until the mandrel has reached the.zrearward'limit of its movement, when the pin' passingfrom the rear endof the said liange allows the bar X to be thrown backward'ly andupw'ardlyby the spring X4, therebyshifting the belt O9 from the fast tothe lloose pulley and stopping the movement of the mandrel.

' The belt-shifting devices for the belt 09 are .preferably so arrangedthat the backward .movement of .the mandrel relatively to the vwhichclamp-bars are arranged to operate before the other clamp-bars E E2, asbefore set forth, the frame is providedvwith rigid hooks .A3, engaginglateral flanges B8 upon the said carriage B, as clearly shown in Figs. 1and 3.

In the particular construction illustra-ted face of themandrel, so astogive a corrugated fform to thetube. As far, however, as the operationof the seaming devices described and shown are concerned, the mandrelmay be cylindric, square, or other form, the faces of the clamp-barsinsuchcase being, of course,

conformed. to the parts of the surface of the -mandrel with which theycome in contactas, .for instance, in case the mandrel is circular, asshown in the detail sectional view,

lindric form, therefore, a series of clamp-bars operating as abovedescribed may be arranged to close upon the mandrel simultaneously orotherwise, as desired. In this connection it may be observed that thenumber of clampbars or clamps `may be greater or less than the numbershown in the particular machine 4illustrated with the same generalresults as far as the operation of the seamin g devices is concerned. v

It is to be understood that the main or general features ofany inventionmaybe carried -out by the use of; details of construction other than theparticularones which are herein loo shown and some of them claimed, andsaid main or general features are therefore herein claimed withoutrestriction to their use in combination with the other parts shown. It

Y vis to be understood, also, that the appended claims cover thedevices', parts, or elements therein shown when said devices, parts, orelements are made in form to obtain vor perform either any orall of. theadvantages or functions obtained or performed vby them inf IS theparticular form thereof herein illustrated.

I claim as my inventionf l.' A machine for making pipe, comprising alongitudinally-movable mandrel, clamps holding vthe sheet 'metal uponthe .-mandrel,

and stationary seam-folders, substantially as described. v 2. Thecombination, with a longitudinally# movable mandrel and clamps forholding the metal `upon the mandrel, of rollersacting to ymetal upon themandrel, of v a longitudinally;

v movable mandrel andv clamps holding the movable mandrel and' clampsholding then metal upon the mandrel, of stationary searn' folders causedlto Aact by t.he ..forward` move-- ment of V the mandrel and metal to'form the seam and a compressing-roller acting vupon the folded metal oftheseam, substantially as described; A

5.' The combination, with alongitudinally' metal upon the mandrel, ofrollersfor closing `the edgesof the metal togetheroverthe man-v drel, astationarywedge-shaped guide for the edges' of the-metal, stationaryseam-folders," and a compressing-rolleractin'gupon -the folded metal ofthe s eam .substantially as described. "i f 6.' Tle combinatiomlvgith alongitudinallymovable 'mandrel and; clamps holding lthe metalnp'on themandel,of rllerS,'as-I"P,for-

' closingtle'edgesof the metal over the man-.drelgasttionarywedge-shaped guide located A.lfetvy'een the said amers,f01iem-fas 13, for;

5o bringing together theedges'of-.th metal, andY lstationaryseam-folders, sul)stantially de;

'8. The combination, with allongitudiiiallyr-4 ingtobendjoneedge of themetalverthe and-asecondfolder. K, operating v\stantially as described.

J, having a slot jg, and provided with a curved surface j3 and with aninclined face j, termi-A nating'in a groovel j5, of a second folder K,Vhavingv a curved slot k2, operating to fold 'the connected parts of theseam down into contact with the adjacent part of the metahsubstantiallyas described. l0. The combination, with alongitudiuallymovable mandrel,of seaming devicesE coniprising aseam-folder J, consistingof two parts JAand J2, each having adjustable connection with the machine-frame,substantially as described. i. 1l. *The combination, with the part J2 ofa Aseam-folder, of a-part J', provided with a laterally-adjnstableplate' J 3, substantially as de.-

scribed.

12. The combination, with the machinef frame and a mandrel movablelongitudinallyfthereon, of folders, as J or K, made in two Aseparateparts, and supporting-arms, as J 4 or AK3, for the folders, adj ustablyattached to the iframe, substantially as described.

13. The combination, with a longitudinallymovable mandrel, of stationaryseam-folders vJ and K and a grooved compressing-roller L, mounted inupwardly-yielding bearings, sub- 14. The combination, with alongitudinallymovable mandrel and stationary seaming'de- 'vices, of adetent engaging the rear end of `Ithe finished tube-at the forward limitof the lmovement thereof, whereby the tube will be held from rearwardmovement with the man1-i" drel,substantially as described.- l5. Thecombination, with a mandrel, of clamps for holding themetalin'contactwith the mandrel, comprisingclam'p-bars movable obliquely'toward andfrom the mandrel and 5 gibs located in'position Vfor engagement with=the ends ofthe clamp-bars -when the latter gare remote from the mandreland in positionfor engagement with the 'outer faces offthe I'IOclamp-bars when the latter are' adjacent to f the mandrel, the mandreland clamp-bars having a bodily-longitudinalmovement relativelyA to thegibs; whereby the said clamp- 'bars `will be thrown and'held bythe saidgibs =i`n position for clamping tially as described.

l 'movablemandrel and vseaming devices comprisingstationaryseam-folders, of clamps for able with. themandrel; and alsomovable ob liquely' toward and from the latter and sta? itinarygibs--locatedin sposition vfor engagelholding'the metali'n contactwithithe man- *dreh comprising two or more clamp baisinovl ment with thesaid clampilbars, substantially' 1 7. Thecombination, with 'the-machine- Qframe, of a longitudinallyQmovable vr` lia.n dl'ol,acarriagesustaining the mandrel, two or more .clamp-bars mounted in thecarriage and mbv 4 able therein obliquely toward `aiid"frouithe mandrel,and two or more gills located-upon the machine-framein posit-ionicengage th e mandrel, and two or more gibs sustained upon the frame inposition to engage the clamp-bars,

said `gibs having rearwardly and outwardly yielding connection with theframe to allow the passage by them of the clamp-bars in the backwardmovement of the carriage, substantially as described. l

19. The combination, with the machineframe, of a longitudinally-movablemandrel, a carriage sustaining the mandrel, two or more clamp-barsmounted in the carriage and movable obliquely toward and'from themandrel, springs applied torhold the said clamp-bars .normally free fromthe mandrel, and gibs located upon the machine-frame in position toVengage said clamp-bars, substantially as described.

20. The combination, with the machineframe, of a carriage B,a mandrel C,mounted upon'said carriage, two or more clamp-bars provided with aseries of inclined slots, projections or studs upon the carriageengaging said slots, springs applied to retain the clam pbars attheouter limit of their movement, andgbs supported upon theframe andengaging the said' clamp-bars, substantially as described.

' 21. The combination, with the machineframe, of a carriage B, amandrelv mounted upon the carriage, two or l more clamp -bars providedwith a series of inclined slots, studs upon the carriage engaging saidslots, and gibs 'upon the machine-frame engaging the clamp-bars, saidclamp-bars being each composed of two Aadjustably connected parts,whereby the position of the working-faces of the bars relatively to themandrel may be varied, substantially as described.

22. The combination, with the vmachineframe, of a carriage B, a mandrelsustained upon said carriage, two or more clamp-bars mounted upon thecarriage, each consisting of a part e', provided with inclined slots e,and a part e2, adjusting-bolts uniting said parts e and e2, studsvuponthe carriage engaging saidslots, and gibs upon the machine-frameengagingsaid clamp-bars, substantially as de- 23. The combination, withthemachine frame, of a carriage B, a mandrel sustained uponsaidcarri-age, two or more clamp-bars mounted upon the carriage, eachconsisting of a part e', provided with inclined slots e, and apart e2,adj usting-bolts es, uniting Said parts e and e2, studs upon thecarriage engaging said slots, and gibs upon the frameengaging the saidclamp-bars, the said parts e e2 of the clamp-bars being provided withinterlocking recesses and projections, substantially as described.

tially as described,

24. The combination, with the machine frame, of a carriage B, a mandrelsustained upon the carriage, two or more. clamp-bars upon the carriagemovable obliquely toward and from the mandrel, gibs located upon themachine-frame parallel with\ the clamp-bars, pivoted linksmovablyconnecting said gibs with the frame, stops upon the frame limit'-ing the forward movement of the gibs, and

springs appliedv to normally hold said gibs in contact with the' stops,substantially .as described.

25. The combination, with themachincframe, the longitudinally-movablemandrel Vand clamp-bars, and carriage sustaining said mandrel andclamp-bars, of gibs located upon the frame parallel with the clamp-bars,bar s F, sustainedupon themachine-frame behind and parallel with thegibs, pivoted links movably lconnecting said.v gibs with the bars F3,stops upon the frame applied to limit the forward movement of the gibs,springs applied to hold the gibs normally in contact with the stops, andadj usting-screws inserted through the frame and engagingthebars F3,substantially as described.

26. The c'ombinatiom'with a longitudinally-l' movable mandrel, of aseries of radially-movable clamp-bars and means acting to advance saidclamp-bars successively into engagement with the mandrel, substantiallyas described.

27. The combination, with the mandrel C f and carriage B,of theclamp-bars mounted upon the carriage and movable toward and from themandrel, and a single clamp-bar D, movable bodily with the mandrel forclamping the metal upon the mandrel before the latter is advanced towardthe clamp-bars, substantially as described.

28. The combination, with the machineframe, of a carriage B, a mandrelC, movable longitudinally upon the carriage, clamp-bars upon thecarriage, a sliding support O for the mandrel, mounted in the carriage,and a clam p-bar D, sustained upon and movablev with said slidingsupport, wherebaysa metal sheet or blank may be' clamped tothe `mandrel, substantially as described. j A

29. The combination, with the, carriagevB', of the support 0, movablelongi udi'nally upon IOO rio

thecarrage, the mandrel C, sustained upon -whereby the clamp will bethrown into Acontact with the mandrel'by the-relative movement of saidsupport and mandrel, substan- ,.zfQ,-;'.lhe combination, -with thecarriage B, of -thcsnpport '0, mounted to s'lide'longitudinally in thecarriage,`the mandrel C, sus-v tained upon the said support'. andmovable longitudinally uponthe latter, a clamp-bar D, connected with themandrehsaid clampbar and support being provided with interittinginclined faces, a detent upon the mal chine-frame engaging the mandrelto hold-the I latter from movement with the support O,

and an arm `upon the support O, having an bar D, located below themandrel and having vertically-movable con nection with the latter,

said clamp-bar and the support O having interttting inclined faces',wherebythe' clampbar is lifted by a forward movement of fthe supportrelatively to the mandrel, and a stop upon the forward end of themachine engaging the support O for moving the latter backward to releasethe'clamp bar D from the mandrel, substantially as described.

32. The combination, with the .machineframe, of the carriage B, providedwith arms or castings B B', clamp-bars supported in said castings, alongitudinally-movable support 0, provided with a rack-bar upon itslower snrface,.a mandrel C, sustained upon the said support, alongitudinal shaft O8, having bearings upon the I nachine-frame and uponthe said carr1age,'a transverse shaft mounted in the carnage andprovided with a pinion engaging the said rack-banand with a beveled"gear-wheel o5 and a beveled gear-wheel o6,

mounted to slide but not to rotate upon the shaft, substantially asdescribed1 33. The combination, -with the machinei frame and the mandrelC, of a clamp-bar D,

acting-against the mandrehland one or more rollers, as lnl fn, mountedupon the machineframe 1n position to bear upon the mandrel in oppositionto the 'action of the said clamp-- bar, substantially as described.'

34. The combination, with V'the machineframe, the mandrel C, andclamp-bars, 'of a.

longitudinally-movable support for said mandrel, connected with thelatter at ,one end, a

clamp-bar D, acting upwardly against the mandrel, a girder N, locatedlongitudinally over the mandrel, and rollers n, mounted upon the girderand constructed to bear upon the top of the mandrel, substantially asdescribed. .35. "The combination, with' the carriage B and mandrel C, ofthe support O, constructed to slide longitudinally inv the said carriageand provided with a standard having a T- head engaging acorrespondingly-shaped slot in the mandrel, a vertical bar D5, secured`in the mandrel and resting at its lower end upon the support. O, and atclamp-barv D, resting upon the support O and united [at itsone end withtle bar D by a connection permitting vertical movement of the clampbar,said snpport and clamp-bar being provided with. in-

terfitting inclined faces, substantially as :def scribed. l 1 36. Thecombinatiomwith'the carriage'B,

mandrel C, and support having. sliding eonnection withI the mandrel, ofthevertcal bar D', secured in the mandrel andl'resting at its' lower endupon the support O, a clamp-bart D, located beneath the mandrel, and alink d pivoted at its ends tothe clamp-bar D vand i the bar D,.said.clamp-bar D and Vsupport O having linterittingv inclinedv faces,.substantially as and -for the purpose set-forth.

37.' The combination, with the machineframe and carriage B, .of Vthe,mandrel YC, mounted upon the carriage andjmovable longitudinally of the'latter, a clamp-bar H,sup

ported upon the carriage, va rod Hvv, rnountsdv in the carriage andprovidedY with eccentrica .engaging the said clamp-bar H,`and with a pinh2 and aA casting H2 upon the frame, provided with a cam-slotengagingthe saidpimf.

h2, whereby the rod is rotated by the forward movement of the carriage,substantially as described. n

38. The combination,with the rnachlne.- frame and the carriage B, ofthe'inandrel- C, mounted upon the carriage, Vaclanp-bar H, supportedupon saidcarriagaashaf-LH, having bearings in 'the carriage and providedwith eccentrics engaging the said.clamp-bars,I

and with a pin h2 at its rearend andan arm' H5 at its forward end, acasting H? upon -the frame, provided with a cam-groove engaging the rodfor rotating the latter in tightening Y the clamp-bar, and a stationarycam-plate H6,"

constructed to engage the arm H5 .at the` for-A ward limit of.the-movement of' the carriage,

substantially as described.'

. 39'. The combination, wlthfthefmaghineframe and the'carriage B,- ofthe mandrel'Cf mounted upon the'said carriage, two radially- I movableclamp-bars '-H' Hfshafts H '11', Vmounted in the carriage andprovidedwith eccentrics engaging the bars, and intermeshing gear-wheels upon'said shafts, one ofsaid shafts being provided with a pin 'h2 at itsrear end and an arm H5 at its forward' end, a

casting -upon the machine-frame provided with a cam-groove engaging thesaid pin Z1?, vand. astationary cam-plateH, engaging tue arm Hat theforward limit of the movement of the carriage, snbstantially'asdescribed.

40. A machine for making corrugated metal pipe, comprising alongitudinally-movable mandrel, a series of radially-movable clamp-.bars operating to press the metal -blauk into contact with the-surfaceof the mandrel, and

`stationary :seam -folders acting -upon' thek lblank in theforwardlnovement'of the manvdrel, substantially 'as described 41. l.Thecombination, with a longitudinally.-

ers for bending the blank about lthe man- I'I'S movablemandrel, oflaterally-movable folds 1 125. Ydrelv and clamp-bars for forcingthemetal,

blank into contact with the mandrel,- substal 1-.:.A

tially as described.

" 42.- The com'binatioxuwith alo'ngitudinallythesheet-m'etal blank upon.the mandrel, ofA

bending the lateral margins of the blank about the mandrel,substantially as` described.

43. The combination, with the machineframe, a carriage B, and a mandrelC, mounted to slide longitudinally upon the carriage, of clamp-bars uponthe carriage for forcing the metal blank into contact with the mandrel,

. laterally-movable folders upon the carriage for bending the blankabout`the mandrel, and stationary cam-surfaces upon the machine-frameactuating said folders in the forward movement of the carriage,substantially as described.

44. The combination, with the machineframe, a carriage B, and a mandrelC, mounted to slide longitudinally upony the carriage, oflaterally-movable folders upon the carriage for bending the blank aboutthe mandrel, stationary cam-surfaces upon the machine-frame actuatingsaid folders inV the forward movement of the carriage, clamp-bars uponthe carriage movable obliquely toward and from the mandrel, and gibsupon the machineframe engaging said clamp-bars inthe forward movelnentof the carriage, substantially as described.

45.A The combination, with the machineframe, the carriage B, movablethereon, and the mandrel C, mounted to slide longitudinally upon thecarriage,A of folders upon the carriage, comprising plates G', mountedto slide obliquely upon the carriage, and flaps G2, hinged to the partsG', rollers upon the frame engaging said plates G2, and cam-surfacesupon the frame engaging and moving the iiaps G2, substantially asdescribed.

46. The combination, with the machineframe, the carriage B, and mandrelC, of folders comprising laterally-movable plates G',

provided with inclined faces at their forward ends, and flaps G2, hingedto the plates G', the said carriage being provided with oblique guidesfor the said parts G', rollers mounted upon the frame and engaging theinclined faces of the said plates G', and stationary cam-surfaces uponthe frame engaging and actuating the flaps G2, substantially asdescribed.

47. The combination, with the machineframe, the carriageB, and mandrelC, of laterally-movable folders, stationary cam-surfaces engaging andactuating the said folders in the forward movement of the carriage, andlongitudinal 'guides upon the frame engaging the said folders after theyhave been closed upon the mandrel, substantially as described.

48. The combination, with the machineframe, the carriage B, and mandrelC, of folders comprising obliquely-movable plates G' and flaps G2,hinged to the plates, rollers upon the machine-frame engaging saidplates G','

' stationary cam-surfaces upon the frame engaging and actuating the saidflaps, and stationary longitudinal guides upon the vframe adapted toengage the free edges of said flaps, substantially as described.

49. The combination, with the machine- 'provided with projections q4upon their free edges, rollers upon the machine-frame engag- -ing saidplates G', stationary cam-surfaces upon the frame engaging said iiaps,and sta- .tionary longitudinal guides G6 uponthe frame,

provided with guide-slots g3, adapted for engagement with saidprojectionsg, substantially as described.

50. The combination, with the machineframe and carriage B, of a mandrelC, sustained upon the carriage, radially-movable clamp-bars providedwithinclined slots e, arms or castings B' B' upon the carriage,consisting of a series of parts B2, provided with connecting-posts b4and forming bearingsfor said clamp-bars, studs secured in the saidcastings and engaged with the slots e, and gibs supported upon themachine-frame in position for engagement with the said clampbars,substantially as described.

5l. The combination, withthe machineframe, the carriage B, mandrel C,and radially-movable clamp-bars E E' E2, of arms or castings B' B',forming bearings for the said clamp-bars, thelower bearing-su rfaces forthe said bars being provided withtransverse ribs sustaining the bars andforming spaces below the bars, substantially as and for the purpose setforth.

52. The combination, with the machineframe, the mandrel C, laterallymovable clamp-bars, and the carriage B, provided with arms or castingsB' B', sustaining the said clamp-bars, of arms Q upon the frame engagingthe outer surfaces of the arms B' B'to relieve the outward strain uponthe latter, substantially as described.

53..'lhe combination, with the machineframe, the mandrel C, thelaterally-movable clamp-bars, as E, provided with inclined slots e, andthe carriage B, provided With arms or castings B' B', sustaining theclamp-bars and IOO provided with studs engaging the slots e, of

gibs upon the frame engaging the said clampbars and arms or castings Qupon the frame engaging the outer surface of said arms B' B',substantially as described.

54. The combination, with the machineframe, the carriage B, mandrel C,and sliding support O, of the shaft O2, actuating the said slidingsupport, provided with fast and loose pulleys, a belt-shifter V, a leverV', connected with said belt-shifter for actuating the latter, a rod V2,connected with the said lever and provided With a projection o4 at itsforward en d, a projection or pin C3, located upon the mandrel inposition to engagesaid projection '124, a second projection or pin C4upon the mandrel, a driving-shaft P' for the carriage,'provided ISO withfast and loose pulleys, a belt-shifter U, and a movable bar U3, havingan inclined surface adapted for engagement with the pin C4 and connectedwith the belt-shifter U for moving the latter, substantially asdescribed.

55. The combination, with the carriage B, the mandrel C, provided with aprojection or pin C4, the laterally-movable folders G Gr upon thecarriage, and a shaft P', actuating' the carriage, provided withfastzand loose pulleys, of a belt-,shifter U, a bafjtconnected "E 'rsaid-pulleys, and means for actuating the with the belt-shifterandprovided-withf clined surface located in the path of the'"pin C, andwith a laterally-projecting part or Wing us, adapted for engagement withone of the folders G, substantially as described.

56. The combination, with the carriage B,

the mandrel C, provided with a projection or pin C4, thelaterally-movable folders G uponthe carriage, and a shaft P', providedwith: fast and loose pulleys, of a belt-shifter U, a.

bar U3, connected with the belt-shifter and provided with aninclinedsurface located in, the path'of the piILC* and with a.projecting part or wing u5, located in positionfor engage# l ment withthe folders G. and a second bar U4, also connected with the belt-shifterand provided withan inclined surface engaging the pin C4 at the forwardlimit of the movement of the mandrel upon the carriage, substantially asdescribed.

57. The combination, with the carriage B, the mandrel C, and the slidingsupport for the mandrel, of the driving-shaft O3, for mov- 'ing saidsupport, provided with two sets of fast and loose pulleys, belt-ShiftersU and X shifter X,`consisting of an obliquelyfmovable bar X', providedwith a ilange X5. and with a hinged latch X6, a spring applied' to holdthe bar at one lim-it of its movementg-and a stud B7 upon the carriageengag'ng'f'aid Bange, substantially as described. Y

In testimony that I claim the foregoing as my invention I affix mysignature in presence of tw witnesses. p

Y ORLANDO P. BRIGGS. Witnesses: Y-

1G. CLARENCE POOLE, M. E. DAYToN.

